#include<stdio.h>
#include<stdlib.h>
void print(int i){
	printf("%d\n");
	char *p=NULL;
	*p='?';
	printf("%c\n",*p);
}
int main(int argc,char* argv[]){
	if(argc!=3){
		printf("error args\n");
		return -1;
	}
	int i=atoi(argv[1]);
    int j=atoi(argv[2]);
	int arr[5]={1,2,3,4,5};
	for(i=0;i<5;i++){
		printf("%3d\n",arr[i]);
	}
	print(i);
	return 0;
}

